Help! 20 points A scientist has two radioactive substances. One emits beta particles, and the other emits alpha particles. He thinks that since the alpha particles are larger, they are more dangerous to humans. Is he correct? Why or why not?

No, because beta particles move faster and can penetrate into the human body more easily.
No, because neither type of particle is dangerous to humans.
Yes, because alpha particles move more slowly, and therefore leave more lasting damage to humans.
Yes, because the larger particles carry more energy and can cause more damage to cells.

No, because beta particles move faster and can penetrate into the human body more easily.

Explanation:

Some beta particles are capable of penetrating the skin and causing damage such as skin burns. However, as with alpha-emitters, beta-emitters are most hazardous when they are inhaled or swallowed.

scientific laws are the result of testing theories and proving them to be facts.

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.